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- ///////////////////////////////////////////////////////////////////////////////
- // type_traits.hpp
- //
- // Copyright 2008 Eric Niebler. Distributed under the Boost
- // Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TYPE_TRAITS_HPP_EAN_10_04_2005
- #define BOOST_XPRESSIVE_DETAIL_STATIC_TYPE_TRAITS_HPP_EAN_10_04_2005
- // MS compatible compilers support #pragma once
- #if defined(_MSC_VER)
- # pragma once
- #endif
- #include <string>
- #include <boost/config.hpp>
- #include <boost/mpl/bool.hpp>
- #include <boost/iterator/iterator_traits.hpp>
- #include <boost/type_traits/is_convertible.hpp>
- #include <boost/xpressive/detail/detail_fwd.hpp>
- namespace boost { namespace xpressive { namespace detail
- {
- ///////////////////////////////////////////////////////////////////////////////
- // is_static_xpression
- //
- template<typename T>
- struct is_static_xpression
- : mpl::false_
- {
- };
- template<typename Matcher, typename Next>
- struct is_static_xpression<static_xpression<Matcher, Next> >
- : mpl::true_
- {
- };
- template<typename Top, typename Next>
- struct is_static_xpression<stacked_xpression<Top, Next> >
- : mpl::true_
- {
- };
- //////////////////////////////////////////////////////////////////////////
- // is_random
- //
- template<typename BidiIter>
- struct is_random
- : is_convertible
- <
- typename iterator_category<BidiIter>::type
- , std::random_access_iterator_tag
- >
- {
- };
- //////////////////////////////////////////////////////////////////////////
- // is_string_iterator
- //
- template<typename Iter>
- struct is_string_iterator
- : mpl::false_
- {
- };
- template<>
- struct is_string_iterator<std::string::iterator>
- : mpl::true_
- {
- };
- template<>
- struct is_string_iterator<std::string::const_iterator>
- : mpl::true_
- {
- };
- #ifndef BOOST_NO_STD_WSTRING
- template<>
- struct is_string_iterator<std::wstring::iterator>
- : mpl::true_
- {
- };
- template<>
- struct is_string_iterator<std::wstring::const_iterator>
- : mpl::true_
- {
- };
- #endif
- ///////////////////////////////////////////////////////////////////////////////
- // is_char
- //
- template<typename T>
- struct is_char
- : mpl::false_
- {};
- template<>
- struct is_char<char>
- : mpl::true_
- {};
- template<>
- struct is_char<wchar_t>
- : mpl::true_
- {};
- }}} // namespace boost::xpressive::detail
- #endif
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